GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 GMC C-Series Medium Duty Truck B7 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Hub/Axle Flange and Wheel Stud Runout Inspection

Wheel Hub/Axle Flange Runout

When lateral runout occurs, inspect the wheel hub/axle flange runout if you are performing an on-vehicle test procedure, but not during off-vehicle testing. The tolerances provided are only guidelines. Perform corrections only if the on-vehicle runout cannot be brought to within tolerance.


    Object Number: 205276 Size: SH
  1. Position the dial indicator on the machined surface of the hub, the axle flange, or the rotor outside of the wheel studs.
  2. Rotate the hub in order to find the low spot.
  3. Set the dial indicator to zero at the low spot.
  4. Rotate the hub again and check the total amount of runout.

    5. Specification Guideline
    Runout tolerance: 2.30 mm (0.0938 in)

Wheel Stud Runout

Use the wheel stud runout procedure whenever the following conditions occur:

    • The off-vehicle radial runout differs significantly from the on-vehicle radial runout
    • Earlier attempts to correct the tire and wheel vibration condition have been unsuccessful

    Object Number: 205279 Size: SH
  1. Position the dial indicator in order to contact the wheel mounting studs.

    2. Measure the stud runout as close to the flange as possible.

  2. Turn the hub to register on each of the studs.
  3. Zero the dial indicator on the lowest stud.
  4. Rotate the hub again and check the total amount of runout.

    5. Specification Guideline
    Runout tolerance: 0.80 mm (0.030 in)